<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- <meta http-equiv="Content-Security-Policy" content="default-src 'self' 'unsafe-inline';"> -->
    <title>Document</title>
</head>
<body>
    <button id="mybtn" >打开子窗口</button>
    <!-- 信息填充到此处 -->
    <div id="mytext"></div>

    <script src="./renderer/demo4.js"></script>
</body>
</html>